Body A in Fig. 6−33 weighs 102N, and body B weighs 32 N . The coefficients of friction between A and the incline are μs=0.56 and μk=0.25. Angle θ is 40°. Let the positive direction of an x axis be up the incline. In unit-vector notation, what is the acceleration of A if A is initially (a) at rest, (b) moving up the incline, and (c) moving down the incline?
